ARM: mx5/mx51_babbage: Add FEC support

Tested it by booting a rootfs via NFS.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

2 files changed, 66 insertions, 1 deletions

diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c
index 6e384d92e625..10d2f6bde172 100644
--- a/arch/arm/mach-mx5/board-mx51_babbage.c
+++ b/arch/arm/mach-mx5/board-mx51_babbage.c
@@ -17,6 +17,7 @@
 #include <linux/delay.h>
 #include <linux/io.h>
 #include <linux/fsl_devices.h>
+#include <linux/fec.h>
 
 #include <mach/common.h>
 #include <mach/hardware.h>
@@ -35,7 +36,8 @@
 
 #define BABBAGE_USB_HUB_RESET   (0*32 + 7)      /* GPIO_1_7 */
 #define BABBAGE_USBH1_STP       (0*32 + 27)     /* GPIO_1_27 */
-#define BABBAGE_PHY_RESET (1*32 +5)     /* GPIO_2_5 */
+#define BABBAGE_PHY_RESET       (1*32 + 5)      /* GPIO_2_5 */
+#define BABBAGE_FEC_PHY_RESET   (1*32 + 14)     /* GPIO_2_14 */
 
 /* USB_CTRL_1 */
 #define MX51_USB_CTRL_1_OFFSET                  0x10
@@ -93,6 +95,28 @@ static struct pad_desc mx51babbage_pads[] = {
 
         /* USB HUB reset line*/
         MX51_PAD_GPIO_1_7__GPIO_1_7,
+
+        /* FEC */
+        MX51_PAD_EIM_EB2__FEC_MDIO,
+        MX51_PAD_EIM_EB3__FEC_RDAT1,
+        MX51_PAD_EIM_CS2__FEC_RDAT2,
+        MX51_PAD_EIM_CS3__FEC_RDAT3,
+        MX51_PAD_EIM_CS4__FEC_RX_ER,
+        MX51_PAD_EIM_CS5__FEC_CRS,
+        MX51_PAD_NANDF_RB2__FEC_COL,
+        MX51_PAD_NANDF_RB3__FEC_RXCLK,
+        MX51_PAD_NANDF_RB6__FEC_RDAT0,
+        MX51_PAD_NANDF_RB7__FEC_TDAT0,
+        MX51_PAD_NANDF_CS2__FEC_TX_ER,
+        MX51_PAD_NANDF_CS3__FEC_MDC,
+        MX51_PAD_NANDF_CS4__FEC_TDAT1,
+        MX51_PAD_NANDF_CS5__FEC_TDAT2,
+        MX51_PAD_NANDF_CS6__FEC_TDAT3,
+        MX51_PAD_NANDF_CS7__FEC_TX_EN,
+        MX51_PAD_NANDF_RDY_INT__FEC_TX_CLK,
+
+        /* FEC PHY reset line */
+        MX51_PAD_EIM_A20__GPIO_2_14,
 };
 
 /* Serial ports */
@@ -171,6 +195,22 @@ static inline void babbage_usbhub_reset(void)
         gpio_set_value(BABBAGE_USB_HUB_RESET, 1);
 }
 
+static inline void babbage_fec_reset(void)
+{
+        int ret;
+
+        /* reset FEC PHY */
+        ret = gpio_request(BABBAGE_FEC_PHY_RESET, "fec-phy-reset");
+        if (ret) {
+                printk(KERN_ERR"failed to get GPIO_FEC_PHY_RESET: %d\n", ret);
+                return;
+        }
+        gpio_direction_output(BABBAGE_FEC_PHY_RESET, 0);
+        gpio_set_value(BABBAGE_FEC_PHY_RESET, 0);
+        msleep(1);
+        gpio_set_value(BABBAGE_FEC_PHY_RESET, 1);
+}
+
 /* This function is board specific as the bit mask for the plldiv will also
 be different for other Freescale SoCs, thus a common bitmask is not
 possible and cannot get place in /plat-mxc/ehci.c.*/
@@ -250,6 +290,7 @@ static void __init mxc_board_init(void)
         mxc_iomux_v3_setup_multiple_pads(mx51babbage_pads,
                                         ARRAY_SIZE(mx51babbage_pads));
         mxc_init_imx_uart();
+        babbage_fec_reset();
         platform_add_devices(devices, ARRAY_SIZE(devices));
 
         mxc_register_device(&mxc_i2c_device0, &babbage_i2c_data);
diff --git a/arch/arm/plat-mxc/include/mach/iomux-mx51.h b/arch/arm/plat-mxc/include/mach/iomux-mx51.h
index 21bfa46785bb..0d77be3a2374 100644
--- a/arch/arm/plat-mxc/include/mach/iomux-mx51.h
+++ b/arch/arm/plat-mxc/include/mach/iomux-mx51.h
@@ -46,6 +46,13 @@ typedef enum iomux_config {
 #define MX51_GPIO_PAD_CTRL              (PAD_CTL_DSE_HIGH | PAD_CTL_PKE | \
                                 PAD_CTL_SRE_FAST)
 
+#define MX51_PAD_CTRL_1 (PAD_CTL_SRE_FAST | PAD_CTL_DSE_HIGH | \
+                                        PAD_CTL_PUE | PAD_CTL_PKE | PAD_CTL_HYS)
+#define MX51_PAD_CTRL_2 (PAD_CTL_HYS | PAD_CTL_PKE)
+#define MX51_PAD_CTRL_3 (PAD_CTL_PKE | PAD_CTL_PUS_100K_UP)
+#define MX51_PAD_CTRL_4 (PAD_CTL_DVS | PAD_CTL_HYS | PAD_CTL_PKE)
+#define MX51_PAD_CTRL_5 (PAD_CTL_DVS | PAD_CTL_DSE_HIGH)
+
 /*
  * The naming convention for the pad modes is MX51_PAD_<padname>__<padmode>
  * If <padname> or <padmode> refers to a GPIO, it is named GPIO_<unit>_<num>
@@ -106,14 +113,20 @@ typedef enum iomux_config {
 #define MX51_PAD_EIM_EB0__EIM_EB0               IOMUX_PAD(0x460, 0x0cc, 0, 0x0,   0, NO_PAD_CTRL)
 #define MX51_PAD_EIM_EB1__EIM_EB1               IOMUX_PAD(0x464, 0x0d0, 0, 0x0,   0, NO_PAD_CTRL)
 #define MX51_PAD_EIM_EB2__GPIO_2_22             IOMUX_PAD(0x468, 0x0d4, 1, 0x0,   0, NO_PAD_CTRL)
+#define MX51_PAD_EIM_EB2__FEC_MDIO              IOMUX_PAD(0x468, 0x0d4, 3, 0x0,   0, MX51_PAD_CTRL_1 | PAD_CTL_PUS_22K_UP)
 #define MX51_PAD_EIM_EB3__GPIO_2_23             IOMUX_PAD(0x46c, 0x0d8, 1, 0x0,   0, NO_PAD_CTRL)
+#define MX51_PAD_EIM_EB3__FEC_RDAT1             IOMUX_PAD(0x46c, 0x0d8, 3, 0x0,   0, MX51_PAD_CTRL_2)
 #define MX51_PAD_EIM_OE__GPIO_2_24              IOMUX_PAD(0x470, 0x0dc, 1, 0x0,   0, NO_PAD_CTRL)
 #define MX51_PAD_EIM_CS0__GPIO_2_25             IOMUX_PAD(0x474, 0x0e0, 1, 0x0,   0, NO_PAD_CTRL)
 #define MX51_PAD_EIM_CS1__GPIO_2_26             IOMUX_PAD(0x478, 0x0e4, 1, 0x0,   0, NO_PAD_CTRL)
 #define MX51_PAD_EIM_CS2__GPIO_2_27             IOMUX_PAD(0x47c, 0x0e8, 1, 0x0,   0, NO_PAD_CTRL)
+#define MX51_PAD_EIM_CS2__FEC_RDAT2             IOMUX_PAD(0x47c, 0x0e8, 3, 0x0,   0, MX51_PAD_CTRL_2)
 #define MX51_PAD_EIM_CS3__GPIO_2_28             IOMUX_PAD(0x480, 0x0ec, 1, 0x0,   0, NO_PAD_CTRL)
+#define MX51_PAD_EIM_CS3__FEC_RDAT3             IOMUX_PAD(0x480, 0x0ec, 3, 0x0,   0, MX51_PAD_CTRL_2)
 #define MX51_PAD_EIM_CS4__GPIO_2_29             IOMUX_PAD(0x484, 0x0f0, 1, 0x0,   0, NO_PAD_CTRL)
+#define MX51_PAD_EIM_CS4__FEC_RX_ER             IOMUX_PAD(0x484, 0x0f0, 3, 0x0,   0, MX51_PAD_CTRL_2)
 #define MX51_PAD_EIM_CS5__GPIO_2_30             IOMUX_PAD(0x488, 0x0f4, 1, 0x0,   0, NO_PAD_CTRL)
+#define MX51_PAD_EIM_CS5__FEC_CRS               IOMUX_PAD(0x488, 0x0f4, 3, 0x0,   0, MX51_PAD_CTRL_2)
 #define MX51_PAD_EIM_DTACK__GPIO_2_31           IOMUX_PAD(0x48c, 0x0f8, 1, 0x0,   0, NO_PAD_CTRL)
 #define MX51_PAD_EIM_LBA__GPIO_3_1              IOMUX_PAD(0x494, 0x0FC, 1, 0x0,   0, NO_PAD_CTRL)
 #define MX51_PAD_EIM_CRE__GPIO_3_2              IOMUX_PAD(0x4A0, 0x100, 1, 0x0,   0, NO_PAD_CTRL)
@@ -126,17 +139,28 @@ typedef enum iomux_config {
 #define MX51_PAD_NANDF_RB0__GPIO_3_8            IOMUX_PAD(0x4F8, 0x11C, 3, 0x0,   0, NO_PAD_CTRL)
 #define MX51_PAD_NANDF_RB1__GPIO_3_9            IOMUX_PAD(0x4FC, 0x120, 3, 0x0,   0, NO_PAD_CTRL)
 #define MX51_PAD_NANDF_RB2__GPIO_3_10           IOMUX_PAD(0x500, 0x124, 3, 0x0,   0, NO_PAD_CTRL)
+#define MX51_PAD_NANDF_RB2__FEC_COL             IOMUX_PAD(0x500, 0x124, 1, 0x0,   0, MX51_PAD_CTRL_2)
 #define MX51_PAD_NANDF_RB3__GPIO_3_11           IOMUX_PAD(0x504, 0x128, 3, 0x0,   0, NO_PAD_CTRL)
+#define MX51_PAD_NANDF_RB3__FEC_RXCLK           IOMUX_PAD(0x504, 0x128, 1, 0x0,   0, MX51_PAD_CTRL_2)
+#define MX51_PAD_NANDF_RB6__FEC_RDAT0           IOMUX_PAD(0x5DC, 0x134, 1, 0x0,   0, MX51_PAD_CTRL_4)
+#define MX51_PAD_NANDF_RB7__FEC_TDAT0           IOMUX_PAD(0x5E0, 0x138, 1, 0x0,   0, MX51_PAD_CTRL_5)
 #define MX51_PAD_GPIO_NAND__GPIO_3_12           IOMUX_PAD(0x514, 0x12C, 3, 0x0,   0, NO_PAD_CTRL)
 #define MX51_PAD_NANDF_CS0__GPIO_3_16           IOMUX_PAD(0x518, 0x130, 3, 0x0,   0, NO_PAD_CTRL)
 #define MX51_PAD_NANDF_CS1__GPIO_3_17           IOMUX_PAD(0x51C, 0x134, 3, 0x0,   0, NO_PAD_CTRL)
 #define MX51_PAD_NANDF_CS2__GPIO_3_18           IOMUX_PAD(0x520, 0x138, 3, 0x0,   0, NO_PAD_CTRL)
+#define MX51_PAD_NANDF_CS2__FEC_TX_ER           IOMUX_PAD(0x520, 0x138, 2, 0x0,   0, MX51_PAD_CTRL_5)
 #define MX51_PAD_NANDF_CS3__GPIO_3_19           IOMUX_PAD(0x524, 0x13C, 3, 0x0,   0, NO_PAD_CTRL)
+#define MX51_PAD_NANDF_CS3__FEC_MDC             IOMUX_PAD(0x524, 0x13C, 2, 0x0,   0, MX51_PAD_CTRL_5)
 #define MX51_PAD_NANDF_CS4__GPIO_3_20           IOMUX_PAD(0x528, 0x140, 3, 0x0,   0, NO_PAD_CTRL)
+#define MX51_PAD_NANDF_CS4__FEC_TDAT1           IOMUX_PAD(0x528, 0x140, 2, 0x0,   0, MX51_PAD_CTRL_5)
 #define MX51_PAD_NANDF_CS5__GPIO_3_21           IOMUX_PAD(0x52C, 0x144, 3, 0x0,   0, NO_PAD_CTRL)
+#define MX51_PAD_NANDF_CS5__FEC_TDAT2           IOMUX_PAD(0x52C, 0x144, 2, 0x0,   0, MX51_PAD_CTRL_5)
 #define MX51_PAD_NANDF_CS6__GPIO_3_22           IOMUX_PAD(0x530, 0x148, 3, 0x0,   0, NO_PAD_CTRL)
+#define MX51_PAD_NANDF_CS6__FEC_TDAT3           IOMUX_PAD(0x530, 0x148, 2, 0x0,   0, MX51_PAD_CTRL_5)
 #define MX51_PAD_NANDF_CS7__GPIO_3_23           IOMUX_PAD(0x534, 0x14C, 3, 0x0,   0, NO_PAD_CTRL)
+#define MX51_PAD_NANDF_CS7__FEC_TX_EN           IOMUX_PAD(0x534, 0x14C, 1, 0x0,   0, MX51_PAD_CTRL_5)
 #define MX51_PAD_NANDF_RDY_INT__GPIO_3_24       IOMUX_PAD(0x538, 0x150, 3, 0x0,   0, NO_PAD_CTRL)
+#define MX51_PAD_NANDF_RDY_INT__FEC_TX_CLK      IOMUX_PAD(0x538, 0x150, 1, 0x0,   0, MX51_PAD_CTRL_4)
 #define MX51_PAD_NANDF_D15__GPIO_3_25           IOMUX_PAD(0x53C, 0x154, 3, 0x0,   0, NO_PAD_CTRL)
 #define MX51_PAD_NANDF_D14__GPIO_3_26           IOMUX_PAD(0x540, 0x158, 3, 0x0,   0, NO_PAD_CTRL)
 #define MX51_PAD_NANDF_D13__GPIO_3_27           IOMUX_PAD(0x544, 0x15C, 3, 0x0,   0, NO_PAD_CTRL)